SOLUTION: Let ∠A and ∠B be supplementary angles and let m∠A=(x^2+ 12x) and let m∠B=(3x^2+20) . What is(are) the value(s) of x? What are the measures of the angles?

Question 1164299: Let ∠A and ∠B be supplementary angles and let m∠A=(x^2+ 12x) and let m∠B=(3x^2+20)
. What is(are) the value(s) of x? What are the measures of the angles?
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
The sum of their measures is 180 degrees. Work with the equation which follows, . Mostly uncomplicated algebra.
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